CVE-2026-34979
Received Received - Intake
Heap-Based Buffer Overflow in OpenPrinting CUPS Scheduler

Publication date: 2026-04-03

Last updated on: 2026-04-16

Assigner: GitHub, Inc.

Description
OpenPrinting CUPS is an open source printing system for Linux and other Unix-like operating systems. In versions 2.4.16 and prior, there is a heap-based buffer overflow in the CUPS scheduler when building filter option strings from job attribute. At time of publication, there are no publicly available patches.
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Meta Information
Published
2026-04-03
Last Modified
2026-04-16
Generated
2026-06-16
AI Q&A
2026-04-04
EPSS Evaluated
2026-06-15
NVD
CVE-2026-34979
Affected Vendors & Products
Showing 1 associated CPE
Vendor Product Version / Range
openprinting cups to 2.4.16 (inc)
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Exploitability
CWE
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KEV
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CWE ID Description
CWE-122 A heap overflow condition is a buffer overflow, where the buffer that can be overwritten is allocated in the heap portion of memory, generally meaning that the buffer was allocated using a routine such as malloc().
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Executive Summary

This vulnerability is a heap-based buffer overflow found in the CUPS scheduler component of OpenPrinting CUPS versions 2.4.16 and earlier. It occurs when the scheduler builds filter option strings from job attributes, potentially causing memory corruption.

Impact Analysis

The vulnerability can lead to a denial of service (DoS) condition due to the heap-based buffer overflow. According to the CVSS score, it does not impact confidentiality or integrity but can affect availability.

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